$($a$)$

Calculate the work done $($in J$)$ on a $1200$ kg elevator car by its cable to lift it $41\mathrm{.}0$ m at constant speed, assuming friction averages $105$ N$.$

J

$($b$)$

What is the work done $($in J$)$ on the lift by the gravitational force in this process?

J

$($c$)$

What is the total work done $($in J$)$ on the lift?

J

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